You are still not providing enough information. The term "waste water" could refer to a lot of different streams in different industries. In our plant, this would most likely refer to streams directed to or processed within our waste water treatment plant. These streams come to mind:
Oily Water Sewer – The composition of this water depends on which unit it is located in. In our cokers and crude units, this is rarely very corrosive. The pump would be made of carbon steel with a 410 SS shaft and non-metallic bushings. If the sump was in our sulfuric acid alkylation unit, it might see concentrated acid or caustic. These sumps must be tested and neutralized before they are transferred to waste water. The pumps are solid Alloy 20.
“Bug Water” – This water is removed from our bio-basins and contains microorganisms used to break down organic solids. This water is extremely corrosive. The pumps are made of duplex stainless steel.
Final Effluent – This is the water that has been fully processed and is ready to discharge into the river. It is fully oxygenated and has neutral PH. The pumps are 316 SS.
I could also imagine the term “waste water” used to refer to sour water (unstripped or stripped, phenolic or non-phenolic), process condensate (boiler feed water contaminated with ammonia), sanitary sewer (grey water or brown water), blow-down from reverse osmosis units (hard water) or maybe even storm water.
Give the temperature you specified, I might be able to shorten my list of potential guesses. But, it would still be a guess.
There are some magnetic coupled pumps lined with PVDF or PTFE that may be suitable.
Again wear depends on the solids as in Cv%, Cw%, density, shape, sharpness, pulp density, size fraction/density solids distribution, impeller tip velocity, temperature, type of acid........................................................
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His Holiness the Dalai Lama.
And we complain about "students" posting questions - which most of the time contain more meaningful data than this post.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
As already stated, exotic alloy or PTFE, ETFE or PFA for the temperature to namr the common materials on the market, then options on shaft seals - mag drive ? Mechanical seal/s ?
In respect of the liquid you are handling beware that corrosion charts are for pure lids. When you blend corrosive fluids together there may be unaccepted consequences. The behaviour may be different to that predicted by the charts. The ony way to determine behaviour is by physical testing.
"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.
engfir,
100 C waste water, in mayority of applications , they are very large pumps, has acidity but at the same time, in plat process, operators add some chemicals to keep ph under control.
Magnetic, ptfe, will be very diffuclt to apply, because of solids content that could damage and the size of pump is very limited.
Do you estimated any capacity in gpm?
Is it a open pit (negative suction) or from a tank (postitive suction)?
ph?
